Re: Understanding Ceph

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On 1/24/2013 9:58 AM, Wido den Hollander wrote:
On 01/24/2013 04:53 PM, Jens Kristian Søgaard wrote:
Hi Dimitri,

Where in ceph.conf do I tell it to use qemu and librbd instead of
kernel module?

You do not need to specify that in ceph.conf.

When you run qemu then specify the disk for example like this:

  -drive format=rbd,file=rbd:/pool/imagename,if=virtio,index=0,boot=on


Small typo :) It has to be:

  -drive format=rbd,file=rbd:pool/imagename,if=virtio,index=0,boot=on

Thanks but I'm still missing the context. I'm following this document:
 http://ceph.com/docs/master/start/quick-start/
to set up an osd/mds/mon *server*.

The step that's failing without the kernel module is "Deploy the configuration #2":
 mkcephfs -a -c /etc/ceph/ceph.conf -k ceph.keyring

Are you saying I'm to run "qemu -drive ..." instead of mkcephfs?

Dima (I'm assuming either you aren't or qemu has changed a lot since I last looked)

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